Composition for use in soldering chain links



Patented June 4, 1935 a I 2,003,865

UNITED STATES PATENT OFFICE 2,003,865 COMPOSITION FOR- USE IN SOLDERING CHAIN LINKS John E. Pilllng, Providence, R. I.

No Drawing. Application July 29, 1932, Serial No. 626,222

2 Claims. (Cl. mat-24) This invention relates to a composition for use In applying the composition to the links, the in soldering chain links. chain as it comes from the chain making ma- It has long been customary to make chains chine is wound or looped in skelns or hanks in from solder tilled wire, but the cost of producing such lengths as can be conveniently handled.

. 5 such wire is high and it is desirable from the Each hankis then placed in the dry powder which 5 viewpoint of expense to employ solid wire. If for convenience maybe contained in a dish. The this is done, however, solder must be introduced dry powder is rubbed onto the chain by the hands in some manner to the minute gap between the and thereby forced into the gaps between the link ends for the purpose of soldering these ends links. Any 011 which is present on the chain is together. Various methods and materials have readily absorbed by the powder so that after a 10 inch proposed for this purpose, for example, it very short period of rubbing the link surfaces are has been suggested that a film of soldering madry and clean, the powder falling ofi except that rial might be applied to the entire surface of which is impacted or retained in the link gaps. the links-including of course their adjacent The chain may now be submitted to heat treatends-by electrolytic action, and a more recent merit to effect the soldering of the link ends method and means advanced is to initially spread together. or smear over the link surface a pasty composi- If desired, the chain may prior to heating be tion comprising a metal'solder powder, red phosrubbed with powdered graphite which has been phorus and oil and then apply a dry powder to very slightly moistened with water to cause it to absorb the moisture of the paste and render it adhere to the link surface, and if extreme caudry enough to fall of! from the links except such tion is exercised the chain may be also dusted as will remain in the gaps. This eth d nd with powdered magnesium or powdered talc.

composition have not proved entirely satisfactory Th ppli i n f h ph m ne ium and i and yet have been deemed preferable to th le talc are not deemed necessary because the rubtrolytic method or the old solder filled wire bing of the chain with the dry powder composimethod. tion of the invention suitably cleans the link Th r nt inv ti i dir t d t th prosurfaces and prevents any so-called still-soldervision of a novel composition of matter which s during' application f the heat.

, can be made up from easily obtained d m If the chain is heavily coated with oil as it a pensive materials in powdered form and appli d leaves the chain making machine, this oil may an initially in its dry state to a soli wire chain be largely removed by wiping the chain prior to The preferred composition comprises copper, its being rubbed with the composition but it is tin and ordinary borax. The proport l parts not necessary to clean the chain in the sense of h may be varied t an appreciable degree in which that operation has heretofore been Q mm; meeting the soldermg ability f the deemed necessary. The application of the dry it 1 have 1 m however, that a composition sufliciently cleans the chain and all having one part of tin, two parts f copper that need be watched is the dry condition of this M three parts of bomx is suitable The tin composition. Where considerable chain is becontent may vary, however from ten to twenty ing handled lt ls desirable to have one or more w at or the whole, and the copper from forty dishes so that if the composition in one tends to 40 1 to thirty per cent of the whole and the borax acbecome q by 9 of absorption it com. Both metals are used m a finely can dr ed out while another dish of composidered state and when mixed with the borax proij r f i" 5 dry Powdered composition 1. A composition of matter for use in the I may 8- use 111 91566 of the ordmary preparation of chains for soldering consisting of I mixtu e 0! hora! bomlc acid (In the powdexjed one part of powdered tin, two parts of powdered state) and sodium chloride (fine salt). These incopper and three parts f bomx 8 81 0 8 1 mi! in equal Part5, that is One-third 2. A composition of matter for use in the a of each by volume- T s mixture 18 in turn mixed preparation of chains for soldering consisting with the tin and pp and in e Sa e pr0p0r of from ten to twenty per cent of tin, from forty tion as the ordinary borax alone so that the final to thirty per cent of copper and the remainder composition is one-sixth part each of borax, borax; all the said ingredients being mixed in horaclc acid. sodium chloride and tin and twopowdered form.

a sixths of copper. JOHN E. FILLING. 66 

